Slow grow autos?

Different strains will have different flowering times. I've had autos start preflower after 2.5 weeks, and I've had autos go 5 weeks before showing any preflower pistils......and the growing conditions were exactly the same. Flower start time comes down to genetics primarily and environment secondary. I have noticed that size and yield were consistent regardless of when preflower started. 66 days is quite long for most autos, you can always try going to 12/12 light schedule to initiate flower, as sometimes the autoflower gene is not expressed in certain instances. Going to 12/12 won't hurt anything unless you have other younger plants in the same tent. Happy growing.

I'm saying, you could probably teach a lot of people something about what you're doing.

The way it's grown can definitely make a difference, essentially it's a balance of potential, nutrients, health state, environment... Roughly speaking, you can classify that as developmental/hormonal balance and maturity. Certain hormones for instance, trigger senescence, flowering, ripening, preservation, elongation, etc. And the way the plant is grown hugely affects that. It is of course peculiar for something that SHOULD mature quickly to not mature quickly, but I see it as a good thing. I'll try to explain... In shit areas, with shit conditions plants try flower quickly, coz of reproductive pressures. In good conditions, they don't... Meaning, you've likely really done REALLY well and essentially boosted the potential.

Yes some auto veg for longer periods. Which isn’t a bad thing unless they are already filling the area completely. They look like they are on their way now so good luck and happy growing!!!